Antenna



The design for an antenna is so thin that it is barely discernable in top, bottom, and side views. All elements of the design are flat and coplanar with each other.

The broken line portion of the FIGURE is included to show unclaimed subject matter only and forms no part of the claimed design.

The two shaded areas are the only areas that are claimed. 

The ornamental design for an antenna, as shown and described. 